Períodos de dessecação de Urochloa ruziziensis e seu reflexo na produtividade da soja RR

Nepomuceno, Mariluce Pascoína; Varela, Rosa M.; Alves, Paulo Roberto Arruda; Martins, José Valcir Fidelis

doi:10.1590/s0100-83582012000300011

Cited by 26 publications

(32 citation statements)

References 17 publications

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“…This period was similar to the period proposed by Silva (2001) for no-till corn but differed from the period of Nunes et al (2009) andNepomuceno et al (2012) for soybean sowing. However, previous studies documented productivity reductions when the sowing was carried out on the same day as the desiccation.…”

Section: Discussionsupporting

confidence: 77%

Desiccation Periods of Urochloa brizantha ‘Piatã’ Before Sunflower Sowing

Giancotti¹,

Nepomuceno²,

Alves³

2013

JAS

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In no-till farming, which integrates crops and livestock, the crop that is sown is often noted for reduced productivity. The aim of this experiment was to study the influence of a desiccation period of Urochloa brizantha 'Piatã' on sunflower 'Aguará 4' development and productivity. The desiccation was carried out using glyphosate herbicide at a dose of 1.92 kg·ha -1 . The treatments consisted of seven periods of U. brizantha desiccation (27, 22, 17, 10, 5, 3 and 0 days) prior to sunflower sowing (2010/11). The experimental design established randomized blocks with five replicates. The reduced period between cover desiccation and crop sowing impaired sunflower development (capitulum diameter, plant height, leaf area, and leaf and stem dry masses) over the course of the evaluations, especially for periods less than or equal to 10 days. Thus, our data suggest that sunflower producers should carry out the desiccation at least ten days prior to sowing.

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Section: Discussionsupporting

confidence: 77%

Desiccation Periods of Urochloa brizantha ‘Piatã’ Before Sunflower Sowing

Giancotti¹,

Nepomuceno²,

Alves³

2013

JAS

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“…Lima et al (2009) also found no change in the final stand of soybean plants from ground cover. Nepomuceno et al (2012), analysing two experiments with 6,000 and 10,000 kg ha -1 dry weight of Brachiaria ruziziensis as ground cover, also found that the mulch formed on the surface of the soil had no significant effect on the stand of RR soybeans evaluated at 20 days after sowing. However, contrary to these results, Lopes et al (2009) observed that in a clayey soil, grazing height had a linear influence on the stand of the soybean plants after emergence, obtaining a smaller stand of plants at the lowest grazing height.…”

Section: Resultsmentioning

confidence: 93%

“…Soybean productivity under different grazing heights of Brachiaria ruziziensis in an integrated crop-livestock system Nepomuceno et al (2012) in an area of no grazing, checked after desiccation of the Brachiaria ruziziensis, 10,000 kg ha -1 dry weight with 100% ground cover. In another area of the same experiment, those authors obtained 6,000 kg ha -1 of dry weight with 80% ground cover.…”

Section: Resultsmentioning

confidence: 99%

“…In the winter preceding the planting of a commercial crop in two seasons under evaluation, Pacheco et al (2011) obtained for this grass as a cover crop, a C/N of 30 and 34 at the time of desiccation. This high ratio of C to N in brachiaria extends the period of decomposition (NEPOMUCENO et al, 2012) and the time the straw remains on the soil surface.…”

Section: Introductionmentioning

confidence: 89%

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Soybean productivity under different grazing heights ofBrachiaria ruziziensisin an integrated crop-livestock system

Ferreira

Oliveira

Alves

et al. 2015

Revista Ciência Agronômica

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Soybean productivity under different grazing heights ofABSTRACT -The aim was to evaluate the effects of grazing height of Brachiaria ruziziensis on the production of straw, and the establishment and grain yield of a soybean crop, under an integrated crop-livestock system, on a typic dystrophic Red Latosol at the Experimental Farm of the Agronomic Institute of Paraná (IAPAR), in Xambrê, in the state of Paraná, Brazil (PR). The study was carried out between September of 2010 and April of 2012. The experimental design was of randomised blocks, in lots split over time, with five treatments and three replications. The following were determined for the Brachiaria ruziziensis: shoot dry matter weight, plant residue dry matter weight, and total dry matter weight (Brachiaria ruziziensis shoot weight + plant residue weight). Also determined were variables related to the yield of the soybean crop (number of plants per metre, plant height and grain productivity), for the crop years 2010/2011 and 2011/2012. Straw production is greater in areas of Brachiaria ruziziensis where there is no grazing compared to areas where grazing occurs; the high production seen in areas with greater grazing heights should also be noted. The final number of plants, plant height and productivity in the soybean were not affected by the grazing height of the Brachiaria ruziziensis.

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“…SILVA et al (2006), studying B. brizantha, observed that intervals above 14 days do not interfere with plant physical characteristics. Yet Nepomuceno et al (2012), who studied U. ruziziensis desiccation preceding soybean sowing, concluded that periods of 10 to 20 days before sowing do not affect soybean yields. NUNES et al (2009) also said that the most appropriate time for chemical management of B. decumbens is between 7 and 14 days before soybean sowing.…”

Section: Resultsmentioning

confidence: 99%

Desiccation time of the spring sorghum as a predecessor crop for summer soybean and autumn bean in a no-tillage system

Denadai

Mello

Chioderoli³

et al. 2016

Eng. Agríc.

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Several authors have been questioned the desiccation interval between the coverage plants and sowing plants for the soybean crop. Therefore, this study aimed to evaluate the desiccation time of the spring sorghum as a predecessor crop for summer soybean and then for autumn bean, focusing on the straw formation for maintenance of the no-tillage system and to evaluate the yield of soybeans and beans grain, as well as analyzing the interference of sorghum straw in these cultures. The experiment was developed in the Teaching and Research Farm of FE/UNESP located in Ilha Solteira/SP where it was used an experimental design of randomized blocks with five treatments and six repetitions. The treatments consisted of five different intervals between sorghum desiccation and soybean sowing (being with D7 -Drying sorghum seven days before the soybean sowing; and successively for D14, D21, D28 and D35). In order to analyze the results, it was used the Tukey test for a 10% level of significance and the statistical program called Sisvar. The "Cober Crop" sorghum exerted influence on soybean yield but this effect was not lasting for the bean crop in succession to the soybeans. KEYWORDS:exudates allelochemicals, soil cover, desiccation interval for sowing, crop rotation, straw production. ÉPOCAS DE DESSECAÇÃO DO SORGO PRIMAVERIL COMO CULTURA ANTECESSORA DA SOJA DE VERÃO E DO FEIJÃO DE OUTONO EM PLANTIO DIRETORESUMO: O intervalo de dessecação entre plantas de cobertura e semeadura da soja vem sendo questionado por diversos autores. O trabalho teve como objetivo avaliar intervalos de dessecação do sorgo de primavera como cultura antecessora da soja de verão e, posteriormente, a cultura do feijão no outono, com ênfase para a formação de palhada para a manutenção do Sistema Plantio Direto e para melhorar a produtividade de grãos da soja e feijão, bem como analisar a interferência da palhada de sorgo nessas culturas. O ensaio foi desenvolvido na Fazenda de Ensino e Pesquisa da FE/UNESP -Ilha Solteira, sendo o delineamento experimental o de blocos casualizados, com 5 tratamentos e 6 repetições. Os tratamentos foram constituídos por 5 intervalos distintos entre dessecação do sorgo e semeadura da soja (sendo D7-Dessecação do sorgo 7 dias antes da semeadura da soja; e assim, sucessivamente, para D14, D21, D28 e D35). Para a análise dos resultados, foi utilizado o teste de Tukey para um nível de significância de 10% e o programa estatístico Sisvar. O sorgo "Cober Crop" exerceu influência sobre a prod utividade da soja, e seu efeito não foi duradouro para o cultivo do feijão em sucessão à soja.

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Períodos de dessecação de Urochloa ruziziensis e seu reflexo na produtividade da soja RR

Cited by 26 publications

References 17 publications

Desiccation Periods of Urochloa brizantha ‘Piatã’ Before Sunflower Sowing

Desiccation Periods of Urochloa brizantha ‘Piatã’ Before Sunflower Sowing

Soybean productivity under different grazing heights ofBrachiaria ruziziensisin an integrated crop-livestock system

Desiccation time of the spring sorghum as a predecessor crop for summer soybean and autumn bean in a no-tillage system

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